Key holder for jacob&#39;s chuck attachment



Ml'h 19, 1946- R. P. MAGNENAT 2,396,921'

yKEY HOLDER FOR JACOBS CHUCK ATTACHMENT Filed June 19, 1,944

- Jarneys A Patented Mar. 19, 1946 KEY HGLDER FOR JACOBS CHUCK ATTACHMENT Ren P. Magnenat, Waterbury, Conn., assigner to Waterbury Companies, Incorporated, Waterbury, Conn., a corporation of Connecticut Application llune 19, 1944, Serial No. 541,097

(Cl. 'T7- 55) 1li Claims.

This invention relates to chuck key holders, and more particularly to a device for holding the operating key of a geared chuck which is usedto rotate the chuck sleeve for fastening a drill or other tool irmly in the chuck.

One object of the invention is to provide a key holding attachment of the above nature having means for pivotally mounting it upon a drill press column so that it may be swung out of the way when not in use and will be prevented from becoming lost.

A further object is to provide a key holding attachment of the above nature having a pinion pilot pin which will always remain at the same level as the sockets in the chuck when the latter is in its uppermost position.

A further object is to provide an attachment of the above nature having a crank handle which may be turned very rapidly to enable drills to be changed without waste of time.

A further object is to provide a device of the above nature which will be simple in construction, inexpensive t manufacture, easy to install and manipulate, compact, ornamental in appearance, and very eilicient and durable in use.

With these and other objects in view, there has been illustrated on the accompanying drawing, one form in which the invention may conveniently be embodied in practice.

In the drawing:

Fig. 1 represents a perspective view of a drill press on which the present invention has been installed.

Fig. 2 is a sectional view of the same, looking downwardly, the section being taken along the line 2 2 of Fig. l, and showing how the attachment is secured to the column of the drill press.

Fig. 3 is a side view of the same.

Fig. 4 is a front view of the attachment taken at right angles to the view shown in Fig. 3.

Fig. 5 is an exploded perspective view of the two-part bracket for holding the attachment on the column of the drill press, together with the swinging arm, and the attaching legs therefor.

Referring now to the drawing in which like reference numerals denote corresponding parts throughout the several views, the numeral I0 indicates the base of a drill press,having a column II upstanding therefrom, upon which is slidably mounted a table I2. The head of the press is indicated by the numeral I3, and depending from said head is a spindle I4 having a drill- 25 secured thereto, as by a J acobs chuck I5.

The Jacobs chuck I5 is provided with three radial sockets I5a which are adapted to be selectively engaged by a key pilot pin I6 formed on the end of a crankshaft I'I, and said pin I6 has associated therewith a pinion I8 which is adapted to engage with the beveled toothed section I9 of the Jacobs chuck I5.

The numeral 20 indicates a crank arm connected with the crank shaft I1 and having a swiveled handle 22. The jaws of the chuck I5 are indicated by the numerals 2L The crankshaft I1 is surrounded by a tubular .bearing 23 and the crank arm '20 is secured to the shaft I1 by means of a cross pin 24.

The crank shaft bearing 23 is carried on the end of an elongated slidable rod 26 which is held adjustably in a channel bracket 29 by means of a hat strap 21 having two apertures 21a, 21a to receive a pair of lock screws 28, 28 which are threaded into the sides of the channel bracket 29 adjacent the groove 34 thereof.

A pair of ears 3D, 3l are formed on the bracket 29, and are provided with tapped holes 32, 33 to receive the lock screws 28, 28. The rear end of the bracket 29 is provided with a .pair of spaced arms 35, 35 which have aligned tapped holes 31, 38 to receive a 'pair of cone-pointed set screws 39, 39a, said screws being held in adjusted position by means of a pair of lock nuts 40, 4I.

Provision is also made of a pair of half collars 43, 41, the former having a boss 42 provided with conical sockets 44, 44 on its opposite at faces for receiving the points of the set screws 39, 39a.

The half collar 43 is also provided with a pair of outwardly extending ears 45, 45 which are in alignment with similar ears 48, 49 ono the half collar 41.

The half collars 43 and 41 are adapted to be secured together by a pair of lock screws 5I), 5I passed loosely through holes 54, in the ears 4B, 49, and screwed into tapped holes 52, 53 in the ears 45,y 45, leaving open spaces 56, 51 between the ears 45 and 48, and 46 and 49 to permit clamping adjustment.

Operation -swung about its pivot bearing on the column I I toward the center of the drill spindle I4, it being understood that the chuck I5 will rst be raised to itsA uppermost position. The body of the chuck will then be twisted manually to bring one of the three sockets I5a of the J acobs chuck into alignment with the pilot pin I6 at the end 0f the crankshaft I1 of the key.

The teeth of the beveled gear I8 will then be forced into mesh with the teeth I9 at the lower end of the chuck sleeve I5. By turning the crank handle 2'2rapidly, the chuck jaws may then be opened or closed to loosen or tighten the chuck, as desired.

It will be understood that the collars 43 and 41 may be adjusted up and down and angularly around the column II, while the rod 26 is adjustable in and out with the respect to the channel bracket 29, so as to cause the axis of the pilot pin I6 to intersect the axis of the spindle I4,

While therehas been disclosed in this speciflcation one form in which the invention may be embodied, it is to be understood that this form is shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosures, but may be modified and embodied in various other forms without departing from its spirit. In short, the invention in-V cludes all the modications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new, and for which it is Vdesired to secure Letters Patent is:

1. In a device for rapidly loosening or tightening a, Jacobs chuck with respect to a drill contained therein, and in which saidchuck is provided with a .plurality of radial sockets and a toothed sleeve adjacent thereto, a swinging arm pivoted upon a iixed support spaced from said chuck and drill, and a crank-operated horizontal pilot pin journaled in the end of said arm and adapted to be selectively inserted into one of said sockets, said pilot pin carrying a pinion adjacent thereto which is shaped to mesh with the teeth on the chuck sleeve.

2. In a device for rapidly operating a chuck mounted in a drill .press having a vertical supporting column, and in which said chuck is provided With a toothed gear section and a plurality of radial sockets, a two-part collar mounted for vertical and angular adjustment on said column, an adjustable elongated arm pivoted in said collar, and a manually-operated horizontal pilot pin journaled in the end of said arm, said pilot pin being adapted to selectively fit into any one of said sockets when the latter is brought into alignment therewith, said pilot pin having a pinion secured rigidly thereto which is shaped to mesh with the teeth of said gear section, said pilot pin being located on the same level as the uppermost position of the sockets of Said chuck sleeve.

3. In a device for rapidly loosening or tightening a Jacobs chuck with respect to a drill contained therein, and in which said chuck is provided with a plurality of radial sockets and a toothed sleeve, a swinging arm pivoted upon a fixed support spaced from said chuck and drill, and a crank-operated pilot pin journaled in the endrof said arm, said piiot pin carrying a pinion coaxial therewith which is shaped to mesh with the teeth on said chuck sleeve when said pilot pin is inserted into one of said sockets.

4. In a device for rapidly loosening or tightening a J acobs chuck with respect to a drill contained therein, and in which said chuck is provided with a plurality of radial sockets and a Atoothed bottom sleeve, a swinging arm pivoted upon a vertical xed support spaced from said chuckand drill, and a crank-operated lpilot pin journaled in the end of said arm, said pilot pin carrying a coaxial pinion which is shaped to mesh with the teeth on said chuck sleeve, said arm being connected to said pivoted support by rneansrof a pair of conical bearings.

5. In a device for rapidly operating a chuck mounted in a drill press having a vertical supporting column, and in which said chuck is provided with a toothed gear section and a plurality of radial sockets, a two-'part adjustable collar mounted for vertical and angular adjustmenton said column, an adjustable elongated arm pivoted in said collarand a manually-operated horizontal pilot pin journaled in the' end of said arm, said pilot pin being adapted to selectively fit into any one of said sockets when the latter is brought into alignment therewith, said pilot pin having a pinion secured rigidly thereto which is shaped to mesh with the teethof said gear section, said pilot pin being located on the same level as the uppermost position of the sockets of said chuck sleeve.

.6. In a device for rapidly operating a chuck mounted in a drill press having a verticol supporting column, and in which said chuck is provided with atoothed gear section and a plurality of radial sockets, a two-part collar mounted for vertical and angular adjustment on said column, an adjustable elongated arm pivoted in vsaid collar, and a manually-operated horizontal pilot pin journaled in the end of said arm, said pilot pin being adapted to selectively lit into any one of said sockets when the latter is brought into alignment therewith, said pilot pin having a pinion secured rigidly thereto which is shaped to mesh with the teeth of said gear section, said pilot pin being located on the same level as the uppermost position of the sockets of said chuck sleeve, said pilot pin being surrounded by a journal bearing sleeve rigidly mounted in the outer end of said elongated arm.

7. In a device for rapidly loosening or tightening a chuck with respect to a drill contained therein, and in which said chuck is provided with a plurality of radial sockets and a toothed sleeve, an extensible swinging arm pivoted upon a fixed support spaced from said chuck and drill, and a crank-operated pilot pin journaled in the end of said arm, said pilot pin carrying a pinion coaxial therewith which is shaped to mesh with the teeth on said chuck sleeve when said pilot pin is inserted into one of said sockets.

8. In a device for rapidly loosening or tightening a chuck with respect to a drill contained therein, and in which said chuck is provided with a plurality of radial sockets and a toothed sleeve, a telescopically mounted extensible swinging arm pivoted upon a fixed support spaced from said chuck and drill, and a crank-operated pilot pin journaled in the end of said arm, said pilot pin carrying a pinion coaxial therewith which is' shaped to mesh with the teeth on said chuck sleeve when said pilot pin is inserted into one of said sockets.

9. In a device for rapidly loosening or tightening a geared chuck with respect to a drill contained therein, and in which said chuck is provided with a plurality of radial sockets and a toothed sleeve adjacent thereto, a swinging arm pivoted upon a xed support spaced from said chuck and drill, and a crank-operated horizontal pilot pin journaled in the end of said arm and adapted to be selectively inserted into one of said sockets, said pilot pin carrying a pinion adjacent thereto which is shaped to mesh -with the teeth on the chuck sleeve. t

10. In a device for rapidly loosening or tightening a geared chuck with respect to a drill contained therein, and in which said chuck is provided with a plurality of radial sockets and a toothed bottom sleeve, a swinging arm pivoted upon a vertical xed support spaced from said y being connected to said pivoted support by means RENE' P. MAGNENAT; 1 

